ADI ADP2441 36V 1A效率94%降压DC电源稳压方案

ADI 公司的ADP2441是36V /1A同步降压DC/DC电源稳压器,负载电流高达1A,输入电压4.5V-36V,输出电压从0.6V到0.9VxVIN,精度±1%,开关频率从300 kHz到1 MHz,效率高达94%,关断电流小于15uA,主要用在POL,分布式电源系统,工业控制电源和DC转换器.本文介绍了ADP2441主要特性,方框图,多种典型应用电路以及ADP2441评估板主要特性,电路图,材料清单和PCB元件布局图.

The ADP2441 is a constant frequency, current mode control, synchronous, step-down dc-to-dc regulator that is capable of driving loads up to 1 A with excellent line and load regulation characteristics. The ADP2441 operates with a wide input voltage range of 4.5 V to 36 V, which makes it ideal for regulating power from a wide variety of sources. In addition, the ADP2441 has very low minimum on time (50 ns) and is, therefore, suitable for applications requiring a very high step-down ratio.

The output voltage can be adjusted from 0.6 V to 0.9 V × VIN. High efficiency is obtained with integrated low resistance N-channel MOSFETs for both high-side and low-side devices.

The switching frequency is adjustable from 300 kHz to 1 MHz with an external resistor. The ADP2441 also has an accurate power-good (PGOOD) open-drain output signal.
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